Encoding and decoding images in quantum optical correlations

Quantum correlations, such as those existing between photons produced by spontaneous parametric down-conversion (SPDC), are ubiquitous in quantum photonic technologies. To develop applications, they must be precisely tailored and efficiently measured, which is often challenging in practice. This article presents an image encoding-decoding method based on the quantum correlations of photon pairs, highlighting recent advances in detecting and controlling these correlations for imaging and sensing applications.